WANTED: Clear 2-Liter Soda Bottles

Our class needs to collect 60-70 2-liter CLEAR soda bottles for a spring science unit.  In order to collect that many, we need to start getting ready and collecting now.  So, I am offering a reward for any student who brings in the bottles (empty, of course).  Each bottle will be worth $10 in class money so send them in!  We have 2 so far, so we are a LONG way from our need.  Keep us in mind for birthday parties, family gatherings, office parties, and holidays!  :)

Thanks!